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| 1 /* Copyright (C)2004 Landmark Graphics Corporation | |
| 2 * Copyright (C)2005 Sun Microsystems, Inc. | |
| 3 * Copyright (C)2009 D. R. Commander | |
| 4 * | |
| 5 * This library is free software and may be redistributed and/or modified under | |
| 6 * the terms of the wxWindows Library License, Version 3.1 or (at your option) | |
| 7 * any later version. The full license is in the LICENSE.txt file included | |
| 8 * with this distribution. | |
| 9 * | |
| 10 * This library is distributed in the hope that it will be useful, | |
| 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 * wxWindows Library License for more details. | |
| 14 */ | |
| 15 | |
| 16 // This implements a JPEG compressor/decompressor using the libjpeg API | |
| 17 | |
| 18 #include <stdio.h> | |
| 19 #include <stdlib.h> | |
| 20 #include <string.h> | |
| 21 #include <jpeglib.h> | |
| 22 #include <jerror.h> | |
| 23 #include <setjmp.h> | |
| 24 #include "./turbojpeg.h" | |
| 25 | |
| 26 | |
| 27 // Error handling | |
| 28 | |
| 29 static char lasterror[JMSG_LENGTH_MAX]="No error"; | |
| 30 | |
| 31 typedef struct _error_mgr | |
| 32 { | |
| 33 struct jpeg_error_mgr pub; | |
| 34 jmp_buf jb; | |
| 35 } error_mgr; | |
| 36 | |
| 37 static void my_error_exit(j_common_ptr cinfo) | |
| 38 { | |
| 39 error_mgr *myerr = (error_mgr *)cinfo->err; | |
| 40 (*cinfo->err->output_message)(cinfo); | |
| 41 longjmp(myerr->jb, 1); | |
| 42 } | |
| 43 | |
| 44 static void my_output_message(j_common_ptr cinfo) | |
| 45 { | |
| 46 (*cinfo->err->format_message)(cinfo, lasterror); | |
| 47 } | |
| 48 | |
| 49 | |
| 50 // Global structures, macros, etc. | |
| 51 | |
| 52 typedef struct _jpgstruct | |
| 53 { | |
| 54 struct jpeg_compress_struct cinfo; | |
| 55 struct jpeg_decompress_struct dinfo; | |
| 56 struct jpeg_destination_mgr jdms; | |
| 57 struct jpeg_source_mgr jsms; | |
| 58 error_mgr jerr; | |
| 59 int initc, initd; | |
| 60 } jpgstruct; | |
| 61 | |
| 62 static const int hsampfactor[NUMSUBOPT]={1, 2, 2, 1}; | |
| 63 static const int vsampfactor[NUMSUBOPT]={1, 1, 2, 1}; | |
| 64 | |
| 65 #define _throw(c) {sprintf(lasterror, "%s", c); return -1;} | |
| 66 #define _catch(f) {if((f)==-1) return -1;} | |
| 67 #define checkhandle(h) jpgstruct *j=(jpgstruct *)h; \ | |
| 68 if(!j) _throw("Invalid handle"); | |
| 69 | |
| 70 | |
| 71 // CO | |
| 72 | |
| 73 static boolean empty_output_buffer(struct jpeg_compress_struct *cinfo) | |
| 74 { | |
| 75 ERREXIT(cinfo, JERR_BUFFER_SIZE); | |
| 76 return TRUE; | |
| 77 } | |
| 78 | |
| 79 static void destination_noop(struct jpeg_compress_struct *cinfo) | |
| 80 { | |
| 81 } | |
| 82 | |
| 83 DLLEXPORT tjhandle DLLCALL tjInitCompress(void) | |
| 84 { | |
| 85 jpgstruct *j=NULL; | |
| 86 if((j=(jpgstruct *)malloc(sizeof(jpgstruct)))==NULL) | |
| 87 {sprintf(lasterror, "Memory allocation failure"); return NULL;} | |
| 88 memset(j, 0, sizeof(jpgstruct)); | |
| 89 j->cinfo.err=jpeg_std_error(&j->jerr.pub); | |
| 90 j->jerr.pub.error_exit=my_error_exit; | |
| 91 j->jerr.pub.output_message=my_output_message; | |
| 92 | |
| 93 if(setjmp(j->jerr.jb)) | |
| 94 { // this will execute if LIBJPEG has an error | |
| 95 if(j) free(j); return NULL; | |
| 96 } | |
| 97 | |
| 98 jpeg_create_compress(&j->cinfo); | |
| 99 j->cinfo.dest=&j->jdms; | |
| 100 j->jdms.init_destination=destination_noop; | |
| 101 j->jdms.empty_output_buffer=empty_output_buffer; | |
| 102 j->jdms.term_destination=destination_noop; | |
| 103 | |
| 104 j->initc=1; | |
| 105 return (tjhandle)j; | |
| 106 } | |
| 107 | |
| 108 DLLEXPORT unsigned long DLLCALL TJBUFSIZE(int width, int height) | |
| 109 { | |
| 110 // This allows enough room in case the image doesn't compress | |
| 111 return ((width+15)&(~15)) * ((height+15)&(~15)) * 6 + 2048; | |
| 112 } | |
| 113 | |
| 114 DLLEXPORT int DLLCALL tjCompress(tjhandle h, | |
| 115 unsigned char *srcbuf, int width, int pitch, int height, int ps, | |
| 116 unsigned char *dstbuf, unsigned long *size, | |
| 117 int jpegsub, int qual, int flags) | |
| 118 { | |
| 119 int i; JSAMPROW *row_pointer=NULL; | |
| 120 | |
| 121 checkhandle(h); | |
| 122 | |
| 123 if(srcbuf==NULL || width<=0 || pitch<0 || height<=0 | |
| 124 || dstbuf==NULL || size==NULL | |
| 125 || jpegsub<0 || jpegsub>=NUMSUBOPT || qual<0 || qual>100) | |
| 126 _throw("Invalid argument in tjCompress()"); | |
| 127 if(ps!=3 && ps!=4) _throw("This compressor can only take 24-bit or 32-bi
t RGB input"); | |
| 128 if(!j->initc) _throw("Instance has not been initialized for compression"
); | |
| 129 | |
| 130 if(pitch==0) pitch=width*ps; | |
| 131 | |
| 132 j->cinfo.image_width = width; | |
| 133 j->cinfo.image_height = height; | |
| 134 j->cinfo.input_components = ps; | |
| 135 | |
| 136 #if JCS_EXTENSIONS==1 | |
| 137 j->cinfo.in_color_space = JCS_EXT_RGB; | |
| 138 if(ps==3 && (flags&TJ_BGR)) | |
| 139 j->cinfo.in_color_space = JCS_EXT_BGR; | |
| 140 else if(ps==4 && !(flags&TJ_BGR) && !(flags&TJ_ALPHAFIRST)) | |
| 141 j->cinfo.in_color_space = JCS_EXT_RGBX; | |
| 142 else if(ps==4 && (flags&TJ_BGR) && !(flags&TJ_ALPHAFIRST)) | |
| 143 j->cinfo.in_color_space = JCS_EXT_BGRX; | |
| 144 else if(ps==4 && (flags&TJ_BGR) && (flags&TJ_ALPHAFIRST)) | |
| 145 j->cinfo.in_color_space = JCS_EXT_XBGR; | |
| 146 else if(ps==4 && !(flags&TJ_BGR) && (flags&TJ_ALPHAFIRST)) | |
| 147 j->cinfo.in_color_space = JCS_EXT_XRGB; | |
| 148 #else | |
| 149 #error "TurboJPEG requires JPEG colorspace extensions" | |
| 150 #endif | |
| 151 | |
| 152 if(flags&TJ_FORCEMMX) putenv("JSIMD_FORCEMMX=1"); | |
| 153 else if(flags&TJ_FORCESSE) putenv("JSIMD_FORCESSE=1"); | |
| 154 else if(flags&TJ_FORCESSE2) putenv("JSIMD_FORCESSE2=1"); | |
| 155 | |
| 156 if(setjmp(j->jerr.jb)) | |
| 157 { // this will execute if LIBJPEG has an error | |
| 158 if(row_pointer) free(row_pointer); | |
| 159 return -1; | |
| 160 } | |
| 161 | |
| 162 jpeg_set_defaults(&j->cinfo); | |
| 163 | |
| 164 jpeg_set_quality(&j->cinfo, qual, TRUE); | |
| 165 if(jpegsub==TJ_GRAYSCALE) | |
| 166 jpeg_set_colorspace(&j->cinfo, JCS_GRAYSCALE); | |
| 167 else | |
| 168 jpeg_set_colorspace(&j->cinfo, JCS_YCbCr); | |
| 169 j->cinfo.dct_method = JDCT_FASTEST; | |
| 170 | |
| 171 j->cinfo.comp_info[0].h_samp_factor=hsampfactor[jpegsub]; | |
| 172 j->cinfo.comp_info[1].h_samp_factor=1; | |
| 173 j->cinfo.comp_info[2].h_samp_factor=1; | |
| 174 j->cinfo.comp_info[0].v_samp_factor=vsampfactor[jpegsub]; | |
| 175 j->cinfo.comp_info[1].v_samp_factor=1; | |
| 176 j->cinfo.comp_info[2].v_samp_factor=1; | |
| 177 | |
| 178 j->jdms.next_output_byte = dstbuf; | |
| 179 j->jdms.free_in_buffer = TJBUFSIZE(j->cinfo.image_width, j->cinfo.image_
height); | |
| 180 | |
| 181 if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*height))==NULL) | |
| 182 _throw("Memory allocation failed in tjInitCompress()"); | |
| 183 for(i=0; i<height; i++) | |
| 184 { | |
| 185 if(flags&TJ_BOTTOMUP) row_pointer[i]= &srcbuf[(height-i-1)*pitch
]; | |
| 186 else row_pointer[i]= &srcbuf[i*pitch]; | |
| 187 } | |
| 188 jpeg_start_compress(&j->cinfo, TRUE); | |
| 189 while(j->cinfo.next_scanline<j->cinfo.image_height) | |
| 190 { | |
| 191 jpeg_write_scanlines(&j->cinfo, &row_pointer[j->cinfo.next_scanl
ine], | |
| 192 j->cinfo.image_height-j->cinfo.next_scanline); | |
| 193 } | |
| 194 jpeg_finish_compress(&j->cinfo); | |
| 195 *size=TJBUFSIZE(j->cinfo.image_width, j->cinfo.image_height) | |
| 196 -(unsigned long)(j->jdms.free_in_buffer); | |
| 197 | |
| 198 if(row_pointer) free(row_pointer); | |
| 199 return 0; | |
| 200 } | |
| 201 | |
| 202 | |
| 203 // DEC | |
| 204 | |
| 205 static boolean fill_input_buffer (struct jpeg_decompress_struct *dinfo) | |
| 206 { | |
| 207 ERREXIT(dinfo, JERR_BUFFER_SIZE); | |
| 208 return TRUE; | |
| 209 } | |
| 210 | |
| 211 static void skip_input_data (struct jpeg_decompress_struct *dinfo, long num_byte
s) | |
| 212 { | |
| 213 dinfo->src->next_input_byte += (size_t) num_bytes; | |
| 214 dinfo->src->bytes_in_buffer -= (size_t) num_bytes; | |
| 215 } | |
| 216 | |
| 217 static void source_noop (struct jpeg_decompress_struct *dinfo) | |
| 218 { | |
| 219 } | |
| 220 | |
| 221 DLLEXPORT tjhandle DLLCALL tjInitDecompress(void) | |
| 222 { | |
| 223 jpgstruct *j; | |
| 224 if((j=(jpgstruct *)malloc(sizeof(jpgstruct)))==NULL) | |
| 225 {sprintf(lasterror, "Memory allocation failure"); return NULL;} | |
| 226 memset(j, 0, sizeof(jpgstruct)); | |
| 227 j->dinfo.err=jpeg_std_error(&j->jerr.pub); | |
| 228 j->jerr.pub.error_exit=my_error_exit; | |
| 229 j->jerr.pub.output_message=my_output_message; | |
| 230 | |
| 231 if(setjmp(j->jerr.jb)) | |
| 232 { // this will execute if LIBJPEG has an error | |
| 233 free(j); return NULL; | |
| 234 } | |
| 235 | |
| 236 jpeg_create_decompress(&j->dinfo); | |
| 237 j->dinfo.src=&j->jsms; | |
| 238 j->jsms.init_source=source_noop; | |
| 239 j->jsms.fill_input_buffer = fill_input_buffer; | |
| 240 j->jsms.skip_input_data = skip_input_data; | |
| 241 j->jsms.resync_to_restart = jpeg_resync_to_restart; | |
| 242 j->jsms.term_source = source_noop; | |
| 243 | |
| 244 j->initd=1; | |
| 245 return (tjhandle)j; | |
| 246 } | |
| 247 | |
| 248 | |
| 249 DLLEXPORT int DLLCALL tjDecompressHeader(tjhandle h, | |
| 250 unsigned char *srcbuf, unsigned long size, | |
| 251 int *width, int *height) | |
| 252 { | |
| 253 checkhandle(h); | |
| 254 | |
| 255 if(srcbuf==NULL || size<=0 || width==NULL || height==NULL) | |
| 256 _throw("Invalid argument in tjDecompressHeader()"); | |
| 257 if(!j->initd) _throw("Instance has not been initialized for decompressio
n"); | |
| 258 | |
| 259 if(setjmp(j->jerr.jb)) | |
| 260 { // this will execute if LIBJPEG has an error | |
| 261 return -1; | |
| 262 } | |
| 263 | |
| 264 j->jsms.bytes_in_buffer = size; | |
| 265 j->jsms.next_input_byte = srcbuf; | |
| 266 | |
| 267 jpeg_read_header(&j->dinfo, TRUE); | |
| 268 | |
| 269 *width=j->dinfo.image_width; *height=j->dinfo.image_height; | |
| 270 | |
| 271 jpeg_abort_decompress(&j->dinfo); | |
| 272 | |
| 273 if(*width<1 || *height<1) _throw("Invalid data returned in header"); | |
| 274 return 0; | |
| 275 } | |
| 276 | |
| 277 | |
| 278 DLLEXPORT int DLLCALL tjDecompress(tjhandle h, | |
| 279 unsigned char *srcbuf, unsigned long size, | |
| 280 unsigned char *dstbuf, int width, int pitch, int height, int ps, | |
| 281 int flags) | |
| 282 { | |
| 283 int i; JSAMPROW *row_pointer=NULL; | |
| 284 | |
| 285 checkhandle(h); | |
| 286 | |
| 287 if(srcbuf==NULL || size<=0 | |
| 288 || dstbuf==NULL || width<=0 || pitch<0 || height<=0) | |
| 289 _throw("Invalid argument in tjDecompress()"); | |
| 290 if(ps!=3 && ps!=4) _throw("This compressor can only take 24-bit or 32-bi
t RGB input"); | |
| 291 if(!j->initd) _throw("Instance has not been initialized for decompressio
n"); | |
| 292 | |
| 293 if(pitch==0) pitch=width*ps; | |
| 294 | |
| 295 if(flags&TJ_FORCEMMX) putenv("JSIMD_FORCEMMX=1"); | |
| 296 else if(flags&TJ_FORCESSE) putenv("JSIMD_FORCESSE=1"); | |
| 297 else if(flags&TJ_FORCESSE2) putenv("JSIMD_FORCESSE2=1"); | |
| 298 | |
| 299 if(setjmp(j->jerr.jb)) | |
| 300 { // this will execute if LIBJPEG has an error | |
| 301 if(row_pointer) free(row_pointer); | |
| 302 return -1; | |
| 303 } | |
| 304 | |
| 305 j->jsms.bytes_in_buffer = size; | |
| 306 j->jsms.next_input_byte = srcbuf; | |
| 307 | |
| 308 jpeg_read_header(&j->dinfo, TRUE); | |
| 309 | |
| 310 if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*height))==NULL) | |
| 311 _throw("Memory allocation failed in tjInitDecompress()"); | |
| 312 for(i=0; i<height; i++) | |
| 313 { | |
| 314 if(flags&TJ_BOTTOMUP) row_pointer[i]= &dstbuf[(height-i-1)*pitch
]; | |
| 315 else row_pointer[i]= &dstbuf[i*pitch]; | |
| 316 } | |
| 317 | |
| 318 #if JCS_EXTENSIONS==1 | |
| 319 j->dinfo.out_color_space = JCS_EXT_RGB; | |
| 320 if(ps==3 && (flags&TJ_BGR)) | |
| 321 j->dinfo.out_color_space = JCS_EXT_BGR; | |
| 322 else if(ps==4 && !(flags&TJ_BGR) && !(flags&TJ_ALPHAFIRST)) | |
| 323 j->dinfo.out_color_space = JCS_EXT_RGBX; | |
| 324 else if(ps==4 && (flags&TJ_BGR) && !(flags&TJ_ALPHAFIRST)) | |
| 325 j->dinfo.out_color_space = JCS_EXT_BGRX; | |
| 326 else if(ps==4 && (flags&TJ_BGR) && (flags&TJ_ALPHAFIRST)) | |
| 327 j->dinfo.out_color_space = JCS_EXT_XBGR; | |
| 328 else if(ps==4 && !(flags&TJ_BGR) && (flags&TJ_ALPHAFIRST)) | |
| 329 j->dinfo.out_color_space = JCS_EXT_XRGB; | |
| 330 #else | |
| 331 #error "TurboJPEG requires JPEG colorspace extensions" | |
| 332 #endif | |
| 333 if(flags&TJ_FASTUPSAMPLE) j->dinfo.do_fancy_upsampling=FALSE; | |
| 334 | |
| 335 jpeg_start_decompress(&j->dinfo); | |
| 336 while(j->dinfo.output_scanline<j->dinfo.output_height) | |
| 337 { | |
| 338 jpeg_read_scanlines(&j->dinfo, &row_pointer[j->dinfo.output_scan
line], | |
| 339 j->dinfo.output_height-j->dinfo.output_scanline); | |
| 340 } | |
| 341 jpeg_finish_decompress(&j->dinfo); | |
| 342 | |
| 343 if(row_pointer) free(row_pointer); | |
| 344 return 0; | |
| 345 } | |
| 346 | |
| 347 | |
| 348 // General | |
| 349 | |
| 350 DLLEXPORT char* DLLCALL tjGetErrorStr(void) | |
| 351 { | |
| 352 return lasterror; | |
| 353 } | |
| 354 | |
| 355 DLLEXPORT int DLLCALL tjDestroy(tjhandle h) | |
| 356 { | |
| 357 checkhandle(h); | |
| 358 if(setjmp(j->jerr.jb)) return -1; | |
| 359 if(j->initc) jpeg_destroy_compress(&j->cinfo); | |
| 360 if(j->initd) jpeg_destroy_decompress(&j->dinfo); | |
| 361 free(j); | |
| 362 return 0; | |
| 363 } | |
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Chromium Code Reviews
Issue 1953443002:
Update to libjpeg_turbo 1.4.90 (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/libjpeg_turbo.git@master